Westport, Kentucky has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 46.4 °F (low) to 66.7 °F (high). Annual precipitation averages 49.9 Inches. Westport is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.1 °F | 41.8 °F | 3.64 in. |
| February | 27.6 °F | 46.3 °F | 3.53 in. |
| March | 35.0 °F | 56.1 °F | 4.5 in. |
| April | 45.0 °F | 67.7 °F | 4.96 in. |
| May | 55.3 °F | 76.4 °F | 5.34 in. |
| June | 63.9 °F | 84.6 °F | 4.98 in. |
| July | 67.5 °F | 87.7 °F | 4.39 in. |
| August | 65.9 °F | 86.7 °F | 3.59 in. |
| September | 58.3 °F | 81.1 °F | 3.48 in. |
| October | 46.8 °F | 70.2 °F | 3.63 in. |
| November | 36.4 °F | 56.4 °F | 3.64 in. |
| December | 29.4 °F | 45.8 °F | 4.22 in. |
| Annual | 46.4 °F | 66.7 °F | 49.9 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |